Spatio-temporal regularity of NDVI changes and erosion sediment of the Beiganliu of the Yellow River

Analysis of the vegetation coverage changing and erosion sediment of the Beiganliu with the time in the last 55 years is the purpose of this paper, and further to study the spatio-temporal regularity of the regional eco-environment in the Loess Plateau. Based on the remote sensing and hydrological data, statistical processing and quantitative analysis, the results show in the last several decades, the lowest grade NDVI (-1 similar to 0.2) lessened 20,900 km(2) from 1980 to 2006, and the highest grade NDVI (0.8 similar to 1) aggrandized 1,500 km the sediment discharge decreased at the rate of 1.72 million t/a and sediment transport modulus at the rate of 33.5 t/km(2) a in the last half-century as a whole.